.POSIX:
.PHONY: build docs

NAME := args

ifneq "$(wildcard src/*.h)" ''
	HEADERS = $(wildcard src/*.h)
endif

ifeq "$(shell id -u)" '0'
	PREFIX := /usr/local
else
	PREFIX := $(HOME)/.local
endif

define DOCS
	$(subst docs/, man/,
		$(patsubst
			%.md, %,
			$(wildcard docs/*.md)
		)
	)
endef

build: build/ build/$(NAME)

build/$(NAME): src/main.c $(HEADERS)
	cc -o $@ $<

install:
	install -CDm0755 -t $(PREFIX)/bin/ build/$(NAME)
	install -CDm0644 -t  $(PREFIX)/share/man/man1 man/$(NAME).1

test:
	$(error testing using `make' not supported; use `just')

docs:
	make $(strip $(DOCS))

man/%: docs/%.md man/
	pandoc --to man \
		--standalone \
		--output $@ \
		$<

%/:
	@mkdir -p $@